42、(9-1)choosethebestanswer:WhichstatementistrueabouttheOracleSQL,DELETEandTRUNCATEstatements?A)DELETEbutnotTRUNCATEstatementcanbeusedtoremovedatafromselectivecolumnsandrowsofatable.B)DELETEandTRUNCAT
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2019-02-27 11:50:44
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208
43、(9-2)choosethreeWhichthreetaskscanbeperformedbyDDLstatements?A)preventingdataretrievalfromatableoutsideofofficehoursB)modifyingatabletopreventdatathatviolatecertainconditionsfrombeingenteredinacolu
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2019-02-27 11:41:18
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41、(8-14)choosetwoViewtheExhibitandexaminethestructureoftheORDERStable.ThecolumnsORDER_MODEandORDER_TOTALhavethedefaultvalues‘direct‘and0respectively.WhichtwoINSERTstatementsarevalid?(Choosetw
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2019-02-27 10:28:02
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225
39.choosethebestanswerViewtheExhibitandexaminethedescriptionoftheEMPLOYEEStable.Youwanttocalculatethetotalremunerationforeachemployee.Totalremunerationisthesumoftheannualsalaryandthepercentagecommissi
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2019-02-26 19:32:31
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40、(8-7)choosetwoWhichtwostatementsaretrueregardingviews?(Choosetwo.)A)Asimpleviewinwhichcolumnaliaseshavebeenusedcannotbeupdated.B)TheORREPLACEoptionisusedtochangethedefinitionofanexistingviewwithout
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2019-02-26 19:01:07
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19.choosethebestanswerViewtheExhibitandexaminethestructureofthePROMOTIONStable.EvaluatethefollowingSQLstatement:SQL>SELECTpromo_name,CASEWHENpromo_cost>=(SELECTAVG(promo_cost)FROMpromotionsWHERE
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2019-02-26 17:44:08
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224
38.choose the best answer View the Exhibit and examine the data in the PROMOTIONS table. PROMO_BEGIN_DATE is stored in the default date format, dd-mon ...
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2019-02-26 17:12:13
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38.choosethebestanswerViewtheExhibitandexaminethedatainthePROMOTIONStable.PROMO_BEGIN_DATEisstoredinthedefaultdateformat,dd-mon-rr.Youneedtoproduceareportthatprovidesthename,cost,andstartdateofallprom
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2019-02-26 17:04:15
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176
39.choose the best answer View the Exhibit and examine the description of the EMPLOYEES table. You want to calculate the total remuneration for each e ...
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2019-02-26 16:53:37
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206
choosethebestanswer:ViewtheExhibitandexaminethestructureoftheCUSTOMERStable.CUSTOMER_VUisaviewbasedonCUSTOMERS_BR1tablewhichhasthesamestructureasCUSTOMERStable.CUSTOMERSneedstobeupdatedtoreflectthelat
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数据库 时间:
2019-02-12 17:20:22
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318